At a size of 9.5mm, the Lenovo ThinkPad Pen Pro provides users with the same shape and feel of an ink writing instrument. With 2048 levels of pressure sensitivity it is an ideal input solution for a precise content creation experience. Users will also enjoy easy access to integrated right and left click buttons that provide additional tools for data interaction. A USB Pen Holder is included with each pen for an easy way to store and carry the pen with you all the time. Powered by an AAAA battery, the Active Capacitive Pen is designed to provide a premium pen experience. It is compatible with the following list of systems: ThinkPad X1 tablet ThinkPad P50 ThinkPad P70 ThinkPad Yoga 460 ThinkPad P40 ThinkPad Yoga 260 ThinkPad X1 YogaThinkPad S1 Yoga 12ThinkPad Yoga 14ThinkPad Yoga 15ThinkPad 11eThinkPad 10ThinkPad Helix